24 inch stones. Old refurbished vertical stone grist mill. I bought this mill from an 86 year old man whose father used to use it to grind grain for the community around Mebane NC in the 1930s and 1940s. Mill likely from about ? 1910. I had Meadows Mills in North Wilkesboro refurbish mill in 2014. Following that it has never been used. It has been in my shed since 2014. It will run off a belt hooked to a tract or PTO or 10-15 hp engine.